Updated A LOT

server/services/zones.js

@@ -0,0 +1,114 @@
+const { all, audit, now, one, run } = require('../db');
+
+let cache = null;
+
+function clearCache() {
+  cache = null;
+}
+
+function lookup() {
+  if (!cache) {
+    cache = {};
+    for (const row of all('SELECT * FROM depreciation_zones')) cache[row.code] = row;
+  }
+  return cache;
+}
+
+// Raw row (incl. dates) for the engine; null when unknown or disabled.
+function getZone(code) {
+  if (!code) return null;
+  const zone = lookup()[code];
+  return zone && zone.enabled ? zone : null;
+}
+
+function slugify(value) {
+  return String(value || '').trim().toLowerCase().replace(/[^a-z0-9]+/g, '_').replace(/^_+|_+$/g, '').slice(0, 40);
+}
+
+function fromRow(row) {
+  if (!row) return null;
+  return {
+    id: row.id,
+    code: row.code,
+    name: row.name,
+    allowance_percent: row.allowance_percent,
+    pis_start: row.pis_start,
+    pis_end: row.pis_end,
+    real_property_end: row.real_property_end,
+    max_recovery_years: row.max_recovery_years,
+    leasehold_life_years: row.leasehold_life_years,
+    notes: row.notes,
+    enabled: Boolean(row.enabled),
+    asset_count: one('SELECT COUNT(*) AS c FROM assets WHERE special_zone = ?', [row.code]).c
+  };
+}
+
+function list() {
+  return all('SELECT * FROM depreciation_zones ORDER BY name').map(fromRow);
+}
+
+function normalize(body) {
+  const num = (v) => (v === '' || v === null || v === undefined ? null : Number(v));
+  return {
+    name: String(body.name || '').trim(),
+    allowance_percent: Number(body.allowance_percent) || 0,
+    pis_start: body.pis_start || null,
+    pis_end: body.pis_end || null,
+    real_property_end: body.real_property_end || null,
+    max_recovery_years: num(body.max_recovery_years),
+    leasehold_life_years: num(body.leasehold_life_years),
+    notes: body.notes || null,
+    enabled: body.enabled === false ? 0 : 1
+  };
+}
+
+function createZone(body, userId) {
+  const input = normalize(body);
+  if (!input.name) throw Object.assign(new Error('A zone name is required'), { status: 400 });
+  const code = slugify(body.code || input.name);
+  if (!code) throw Object.assign(new Error('A valid zone code is required'), { status: 400 });
+  if (one('SELECT id FROM depreciation_zones WHERE code = ?', [code])) {
+    throw Object.assign(new Error('A zone with that code already exists'), { status: 400 });
+  }
+  const ts = now();
+  run(
+    `INSERT INTO depreciation_zones (code, name, allowance_percent, pis_start, pis_end, real_property_end, max_recovery_years, leasehold_life_years, notes, enabled, created_at, updated_at)
+     VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)`,
+    [code, input.name, input.allowance_percent, input.pis_start, input.pis_end, input.real_property_end, input.max_recovery_years, input.leasehold_life_years, input.notes, input.enabled, ts, ts]
+  );
+  clearCache();
+  audit(userId, 'create', 'depreciation_zone', code, null, input);
+  return fromRow(one('SELECT * FROM depreciation_zones WHERE code = ?', [code]));
+}
+
+function updateZone(code, body, userId) {
+  const before = one('SELECT * FROM depreciation_zones WHERE code = ?', [code]);
+  if (!before) return null;
+  const input = normalize({ ...before, ...body, enabled: body.enabled === undefined ? Boolean(before.enabled) : body.enabled });
+  run(
+    `UPDATE depreciation_zones SET name = ?, allowance_percent = ?, pis_start = ?, pis_end = ?, real_property_end = ?,
+       max_recovery_years = ?, leasehold_life_years = ?, notes = ?, enabled = ?, updated_at = ? WHERE code = ?`,
+    [input.name, input.allowance_percent, input.pis_start, input.pis_end, input.real_property_end, input.max_recovery_years, input.leasehold_life_years, input.notes, input.enabled, now(), code]
+  );
+  clearCache();
+  audit(userId, 'update', 'depreciation_zone', code, before, input);
+  return fromRow(one('SELECT * FROM depreciation_zones WHERE code = ?', [code]));
+}
+
+function deleteZone(code, userId) {
+  const before = one('SELECT * FROM depreciation_zones WHERE code = ?', [code]);
+  if (!before) return false;
+  run('DELETE FROM depreciation_zones WHERE code = ?', [code]);
+  clearCache();
+  audit(userId, 'delete', 'depreciation_zone', code, before, null);
+  return true;
+}
+
+module.exports = {
+  clearCache,
+  createZone,
+  deleteZone,
+  getZone,
+  list,
+  updateZone
+};